210221102101121 has 4 divisors (see below), whose sum is σ = 210221366714112. Its totient is φ = 210220837488132.

The previous prime is 210221102101063. The next prime is 210221102101133. The reversal of 210221102101121 is 121101201122012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210221102101121 - 2¹⁴ = 210221102084737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210221102101121.

It is not an unprimeable number, because it can be changed into a prime (210221102001121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131111225 + ... + 132704918.

It is an arithmetic number, because the mean of its divisors is an integer number (52555341678528).

Almost surely, 2^{210221102101121} is an apocalyptic number.

It is an amenable number.

210221102101121 is a deficient number, since it is larger than the sum of its proper divisors (264612991).

210221102101121 is an equidigital number, since it uses as much as digits as its factorization.

210221102101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264612990.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210221102101121 its reverse (121101201122012), we get a palindrome (331322303223133).

The spelling of 210221102101121 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred two million, one hundred one thousand, one hundred twenty-one".